Benzoheterocyclicalkyl derivatives of 2,4,9-triazaspiro(5,5)undecan-1,3,5-trione

ABSTRACT

Benzoheterocyclicalkyl derivatives of 2,4,9triazaspiro(5,5)undecan-1,3,5-trione in which the benzoheterocyclic moiety is thianaphthemyl or benzofuranyl, optionally substituted by chloro, bromo, fluoro, methyl, methoxy or trifluoromethyl, have neuroleptic activity. The compounds are generally prepared from either the benzoheterocyclicalkyl halide by reaction with the appropriate amine or the benzoheterocyclic amine by condensation with a 5,5-bis( Beta -haloethyl)barbituric acid.

United States Patent 1 4, 12 Kaiser et al. {4511 Aug. 15, 1972 [54] BENZOHETEROCYCLICALKYL [56] References Cited DERIVATIVES or 2,4,9- UNITED STATES PATENTS TRlAZASPIRO(S,5)UNDECAN-l,3,5- TRIONE Inventors: Carl Kaiser; Charles L. Zirkle, both of 1500 Spring Garden St., Philadelphia, Pa. 19101 Filed: March 10, 1971 Appl. No.: 123,089

Related US. Application Data Division of Ser. No. 771,320, Oct. 28, 1968, Pat. No. 3,629,267.

US. Cl. ..260/256.5 R, 260/2564 C Int. Cl. ..C07d 99/06 Field of Search ..260/256.5 R, 256.4 C

3,629,267 12/1971 Kaiser et a1. ..260/256.5 R

Primary Examiner-Alex Mazel Assistant Examiner-R. J. Gallagher Attorney-William H. Edgerton et a1.

[ ABSTRACT Benzoheterocyclicalkyl derivatives of 2,4,9- triazaspiro[5,5]undecan-l,3,5-trione in which the benzoheterocyclic moiety is thianaphthemyl or benzofuranyl, optionally substituted by chloro, bromo,

nfluoro, methyl, methoxy or trifluoromethyl, have neu- 7 Claims, No Drawings kyl derivatives of 4-(2-ketol'benzimidazolinynpiperidine, 4-(2-keto-1-benzimidazolinyl)-1,2,3 ,6- tetrahydropyridine, 1-phenyl-l,3 ,8-triazaspiro[ oral administration of doses ranging from 1.0 to 50.0-

mg/kg. At these doses no toxicity is observed.

The compounds of this invention are represented by the following general structural formula:

R1 1 (CHQ)H Z Y Formula I in which:

R represents hydrogen, chloro, bromo, fluoro, methyl, methoxy or trifluoromethyl;

Y represents oxygen or sulfur;

n represents a positive whole integer from 2 to 4; and

Z represents -N II o NH or Preferred compounds include those of Formula I wherein R is in the or'o-position, Y is sulfur, n is 3 and the benzoheterocyclic moiety is 3-substituted.

The compounds of this invention may be used in the form of a pharmaceutically acceptable acid addition salt having the utility of the free base. Such salts, prepared by methods well known to the art, are formed with both inorganic or organic acids, for example: malei'c, fumaric, benzoic, ascorbic, pamoic, succinic, bismethylenesalicyclic, methanesulfonic, ethanedisulfonic, acetic, oxalic, propionic, tartaric, salicyclic, citric, gluconic, lactic, malic, mandelic, cinnamic, citraconic, aspartic, stearic, palmitic, itaconic, glycolic, p-aminobenzoic, glutamic, benzenesulfonic, hydrochloric, hydrobromic, sulfuric, sulfamic,

phosphoric and nitric acids.

The compounds of this invention wherein Z is 4-( 2 ketol -benzimidazo1inyl)- l -piperidyl, 4-( 2-ketol benzimidazolinyl)-1,2,3,6-tetrahydro-1-pyridyl or 1- 5 phenyl-l ,3,8-triazaspiro[4,5 ]dec-8-yl-4-one are generally prepared from a benzoheterocyclicalkyl halide having the formula:

10 R1 (CHrh-X Y Formula II wherein R,, Y and n are as defined for Formula I and X is halogen, preferably chlorine orfbromine, by reaction with the appropriate amine (HZ). The halides of 'For- 'mula II are prepared from corresponding alkanoic acids (n is l to 3) via reduction with lithium aluminum hydride to the alcohol followed by reaction with a phosphorus trihalide, such as phosphorus tribromide, to give the alkyl halide. The required alkanoic acids are obtained as described in Belgian Pat. No. 71 1,675.

The compounds of Formula I wherein Z is 2,4,9 triazaspiro[5,5Jundec-9-yl-1,3,5-d|ione are generally prepared from a benzoheterocyclicalkyl amine having the formula:

(CH?) 11""NH2 wherein R Y and n are as defined in Formula I by reaction with a 5,5-bis(B-haloethyl)-barbituric acid derivative, the halo group being iodo or bromo. The amines of Formula III are prepared from corresponding alkanoic acids (n is 1 to 3) via reacting the acid with thionyl chloride to give the acid chloride which is treated with ammonia and reducing the resulting amide with lithium aluminum hydride to yield the alkyl amine.

The compounds of this invention may be administered orally or parentera'lly in conventional dosage unit forms such as tablets, capsules, injectables or the like, by incorporating the appropriate dose of a compound of Formula I, either as the free base or an acid addition salt thereof, with carriers according to accepted pharmaceutical practices.

The foregoing is a general description-of how to prepare the compounds of this invention. The following examples illustrate the preparation of specific compounds having neuroleptic activity. However this should not be construed as limiting the scope of the invention since appropriate variations in the starting materials will produce other products set forth hereinabove.

PREPARATIONS A. 3-(3-Thianaphthenyl)-propyl bromide (Formula II) To a mixture of 4.0 g. (0.105 m.) of lithium aluminum hydride in 1,000 ml. of dry ether is added a solution of 10.7 g. 0.052 m.) of 3-(3-thianaphthenyl)- propionic acid in 50 ml. of dry tetrahydrofuran, drop- 1 ml. of phosphorus tribromide in 50 ml. of dry ether is added dropwise. The resulting mixture is stirred and refluxed for one hour, poured into ice-water and the layers separated. The ether layer is washed, dried and evaporated in vacuo to give an oil which is distilled to give 3-(3-thianaphthenyl)-propyl bromide, b.p. 147l90 C./0.1 mm.

B. 3-(3-Thianaphthenyl)-propyl amine (Formula 111) A mixture of 5.2 g. (0.025 m.) of 3-(3-thianaphthenyl)-propionic acid and 15 ml. (0.025 m.) of thionyl chloride is allowed to stand at room temperature overnight, diluted with benzene and evaporated in vacuo to give the acid chloride. The latter is dissolved in ether and treated with anexcess of aqueous ammonia. The resulting mixture is refluxed for 1 hour and the separated organic layer is washed, dried and concentrated to give 3-(3-thianaphthenyl)-propionamide. The amide is reduced with an equimolar amount of lithium aluminum hydride in dry ether to yield 3-(3-thianaphthenyl)-propylamine.

Following the procedures of parts A or B above, other R -substituted thianaphthene-or benzofuranalkanoic acids are similarly converted to corresponding alkyl bromides or amines. I

EXAMPLE 1 A mixture of 4.7 g. (0.0219 m.) of 4-(2-keto-lbenzimidazolinyl)-1,2,3,6-tetrahydropyridine, 8.0 g. (0.0314 m.) of 3-(3-thianaphthenyl)-propyl bromide, 1.84 g. (0.0219 m.) of sodium bicarbonate and 0.3 g. of potassium iodide in 500 ml. of dry toluene is stirred and refluxed for 4 days. The reaction mixture is evaporated in vacuo and the residue is dissolved in chloroform/water. The water layer is washed with chloroform and the total chloroform solution is washed with dilute hydrochloric acid, dried and evaporated in vacuo to give l-[3-(3-thianaphthenyl)-propyl]-4-(2- keto-1-benzimidazolinyl)-1,2,3 ,6-tetrahydropyridine; hydrochloride m.p. 252254 C.

Similarly, by employing 3-(5-chloro-2-thianaphthenyl)-propyl bromide (obtained from the propionic acid) in the above reaction there is produced l-[3-(5- chloro-2-thianaphthenyl)-propyl]-4-( Z-ketol benzimidazolinyl)-l ,2,3 ,6-tetrahydropyridine.

EXAMPLE 2 A mixture of 8.0 g. (0.0314 in.) of 3-(3-thianaphthenyl)-propyl bromide, 4.4 g. (0.0203 m.) of 4-(2-keto-lbenzimidazolinyl)-piperidine, 1.71 g. (0.0203 m.) of sodium bicarbonate and 0.3 g. of potassium iodide in 500 ml. of dry toluene is stirred and refluxed for four days. The reaction mixture is evaporated in vacuo and the residue dissolved in chloroform/water. The layers are separated and further worked up as in Example 1 toyield l-[3-(3-thianapthenyl)-propyl]-4-(2-keto-lbenzimidazolinyl)-piperidine; hydrochloride m.p. 287-294 C.

Similarly, by employing an equivalent amount of 3- (5-methyl-3-thianaphthenyl)-propyl bromide (obtained from the propionic acid) as described above there is prepared 1-[3(5-methyl-3-thianaphthenyl)- propyl]-4-( 2-ketol -benzimidazolinyl )-piperidine.

EXAMPLE 3 Following the procedures of Example 1, a mixture of 5.0 g. (0.0216 m.) of l-phenyl-l,3,8-triazaspiro[ 4,5]decan-4-one, 8.0 g. (0.0314 m.) of 3-(3-thianaphthenyl)-propyl bromide, 1.82 g. (0.0216 m.) of sodium bicarbonate and 0.3 g. of potassium iodide in 500 ml. of dry toluene is stirred and refluxed for four days, then filtered while hot. The filtrate is evaporated in vacuo and the residue worked up to give l-phenyl-8 [3-( 3-thianaphthenyl)-pr0pyl]-l ,3,8-triazaspiro[4,5 ]decan-4-one; hydrochloride mp. 25 8260 C.

Use of 3-(6-methoxy-Z-thianaphthenyl)-propyl bromide (obtained from the propionic acid) as the reactant above yields l-phenyl8-[3-(6-methoxy-2-thianaphthenyl)-propyl]-l ,3,8-triazaspiro[4,5 ]decan-4- one.

EXAMPLE 4 A solution of 6.0 g. (0.03 m.) of 3-(3-thianaphthenyl)-propylamine in 60 ml. of anhydrous ethanol is added to a suspension of 11.7 g. (0.027 m.) of 5,5- bis(B-iodoethyDbarbituric acid in ml. of anhydrous ethanol and the mixture is shaken 2% hours in the dark under nitrogen. One equivalent of dry silver oxide and, after shaking for 3 days, one more equivalent of silver oxide is added. The mixture is then shaken for 3 hours, briefly heated to 60 C., filtered and evaporated. The residue is purified by chromatography to give 9-[3-(3- thianaphthenyD-propyl]-2,4,9-triazaspiro (5,51 undecan-l ,3 ,S-trione.

Similarly, by reacting 3-(3-benzofuranyl)- propylamine (obtained from the propionic acid) with 5,5-bis(B-iodoethyl)barbituric acid as described above there is prepared 9-[3-(3-benzofuranyl)-propyl]-2,4,9 triazaspiro[5,5 ]dundecan-l ,3 ,S-trione.

EXAMPLE 5 Following the procedure of Example 1, an equivalent amount of 3-(2-benzofuranyl)-propyl bromide (obtained from the propionic acid) is reacted with 4-(2- ketol -benzimidazolinyl)-l ,2,3,6-tetrahydropyridine in the presence of sodium bicarbonate and potassium iodide to yield upon workup 1-[3-(2-benzofuranyl)- propyl ]-4-(2-ketol -benzimidazolinyl 1 ,2,3,6- tetrahydropyridine.

By employing instead 3-(3-benzofuranyl)-propyl bromide as the reactant above there is obtained l-[3- (3-benzofuranyl )-propyl]-4-( 2-ketol -benzimidazolinyl)-l ,2,3,6-tetrahydropyridine.

EXAMPLE 6 Following the procedure of Example 1, 3-(6-fluoro- 3-thianaphthenyl)-propyl bromide (obtained from the propionic acid) is reacted with 4-(2-keto-lbenzimidazolinyl)-l ,2,3,6-tetrahydropyridine to give 1- [3-( 6-fluoro-3-thianaphthenyl )-propyl -4-( 2-ketol benzimidazolinyl)-1,2,3 ,6-tetrahydropyridine.

Use of 3-(6-trifluoromethyl-3-thianaphthenyl)- propyl bromide as described above yields l[3-(6- trifluoromethyl-3-thianaphthenyl )-propyl]-4-( 2-keto-l -benzimidazolinyl)- l ,2,3 ,6-tetrahydropyridine.

EXAMPLE 7 Following the procedure of Example 1, 3-(6-bromo- 3-benzofuranyl)-propyl bromide (obtained from the propionic acid) is reacted with 4-(2-keto-lbenzimidazolinyl)-l,2,3,6-tetrahydropyridine to yield the product 1-[3-(6-bromo-3-benzofuranyl)-propyl1-4- (2-keto-1-benzimidazolinyl)-l ,2,3,6- tetrahydropyridine.

EXAMPLE 8 or a pharmaccutically acceptable acid addition salt thereof, wherein:

R is hydrogen, chloro, bromo, fluoro, methyl,

methoxy or trifluoromethyl;

Y is oxygen or sulfur;

n is a whole integer from 2 to 4; and

Z is

2. A chemical compound according to claim 1 in which the benzoheterocyclic moiety is 3-substituted and has the R substituent in the 5 or 6-position.

3. A chemical compound according to claim 2 in which Y is sulfur and n is 3.

4. A chemical compound according to claim 3 in which R is hydrogen, chloro or fluoro.

5. A chemical compound according to claim 4 in which R is hydrogen, being the compound 9-[3-(3-thianaphthenyl)-propyl]-2,4,9-triaza.spiro[5 ,5] l ,3 ,S-trione.

6. A chemical compound according to claim 4 in which R is fluoro. v

7. A chemical compound according to claim 4 in which R, is chloro.

23 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,634,312 Dated September 18, 1972 Inventor(s) Carl Kaiser and Charles L. Zirkle It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

' 0n the face of the patent the assignee should be indicated as follows: a

[73] Assignee: Smith Klihe &- French Laboratories, Philadelphia, Pa.

Column 6, lines 6 .13, the partial structural formula should read as follows:

Signed and sealed this 17th day of April 1973.

(SEAL) Attest:

EDWARD M.FLETCHER ,JR. I ROBERT GOTTSCHALK Attesting Officer Commissionerof Patents 

2. A chemical compound according to claim 1 in which the benzoheterocyclic moiety is 3-substituted and has the R1 substituent in the 5 or 6-position.
 3. A chemical compound according to claim 2 in which Y is sulfur and n is
 3. 4. A chemical compound according to claim 3 in which R1 is hydrogen, chloro or fluoro.
 5. A chemical compound according to claim 4 in which R1 is hydrogen, being the compound 9-(3-(3-thianaphthenyl)-propyl)-2,4, 9-triazaspiro(5,5)undecan-1,3,5-trione.
 6. A chemical compound according to claim 4 in which R1 is fluoro.
 7. A chemical compound according to claim 4 in which R1 is chloro. 